61649396 has 6 divisors (see below), whose sum is σ = 107886450. Its totient is φ = 30824696.

The previous prime is 61649267. The next prime is 61649431. The reversal of 61649396 is 69394616.

It can be written as a sum of positive squares in only one way, i.e., 61622500 + 26896 = 7850^2 + 164^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7706171 + ... + 7706178.

It is an arithmetic number, because the mean of its divisors is an integer number (17981075).

Almost surely, 2^61649396 is an apocalyptic number.

It is an amenable number.

61649396 is a deficient number, since it is larger than the sum of its proper divisors (46237054).

61649396 is a wasteful number, since it uses less digits than its factorization.

61649396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15412353 (or 15412351 counting only the distinct ones).

The product of its digits is 209952, while the sum is 44.

The square root of 61649396 is about 7851.7129341310. The cubic root of 61649396 is about 395.0417004525.

The spelling of 61649396 in words is "sixty-one million, six hundred forty-nine thousand, three hundred ninety-six".